bcl2 inhibition by abt-199 in t-cell acute lymphoblastic leukemia …/media/files/promega...
TRANSCRIPT
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Pieter Van Vlierberghe
Bioluminescent Cell-based Assay Seminar Day Monday 31 march 2014 UCL De Duve institute
Brussels, Belgium
BCL2 inhibition by ABT-199 in T-cell acute lymphoblastic leukemia (T-ALL)
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2
Short Bio sketch
PhD 2003-2008 Pediatric Oncology
Erasmus Medical Center Rotterdam, The Netherlands
Postdoc 2008-2013 Institute for Cancer Genetics
Columbia University Medical Center New York, USA
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3
Short Biosketch
Turner BioSystems Modulus® II Microplate Mul9mode Reader
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4
Short Bio sketch
Odysseus type II grant 2013-2017
Center for Medical Genetics Ghent University
GloMax®-Multi Microplate Reader
CellTiter-Glo® Luminescent Cell Viability
Caspase-Glo® 3/7 Apoptosis Assay
BCA protein assays
Luciferase assays miRNA-mRNA regulation
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5
From normal development to malignant transformation
Immature ETP-‐ALL
Coustan-‐Smith et al., Lancet Oncology, 2009
Early T-‐cell precursor ALL (ETP-‐ALL)
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6
Genetic heterogeneity in human ETP-ALL
JAK/STAT signaling
IL7R JAK1 JAK3
Myeloid development ETV6
Chromatin remodeling
EZH2
Genetic heterogeneity provides challenges for the implementation of a uniform targeted therapy in ETP-ALL
ETP Non-ETP
Zhang et al., Nature 2012
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Unique features of human ETP-ALL
7
ETP Non-ETP
Human ETP-ALLs have a unique
gene expression signature
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Therapeu1c targets in human ETP-‐ALL gene expression profile
8
ETP Non-ETP
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High BCL2 expression in human ETP-ALL
9
BCL-2
Fold change > 2; p<0.05
ETP-ALL Other genetic subtypes human T-ALL
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High BCL2 expression a reflection of T cell differentiation?
10
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High BCL2 expression a reflection of T cell differentiation?
11
BCL-2
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BCL2 inhibition as a therapeutic strategy
12 Davids & Letai, Journal of Clinical Oncology 2013
Davids & Letai, Cancer Cell 2013
ABT-263 (Navitoclax) : BCL-2, BCL-xL ABT-199 : BCL-2 only
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ABT-199 as a new therapeutic strategy in human cancer
13
January 2013
Clinical Phase I Trials in relapsed or treatment-resistant CLL
Tumor Lysis Syndrome
Reports on anti-tumoral effect in:
acute myeloid leukemia multiple myeloma
estrogen receptor-positive breast cancer
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ABT-199 expression in human T-ALL cell lines
14
mRN
A ex
pres
sion
P
rote
in
LOU
CY
ALL
-SIL
TALL
-1
DN
D41
C
UTT
L1 K
OP
TK1 P
F382
JUR
KAT
K
AR
PAS
45
PE
ER
CC
RF-
CE
M
BCL-2
β-actin
BCL-‐2 expression
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ABT-199 and cell viability in human T-ALL cell lines
15 CellTiter-Glo® Luminescent Cell Viability
GloMax®-Multi Microplate Reader
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ABT-199 IC50 in human T-ALL cell lines
16 CellTiter-Glo® Luminescent Cell Viability
GloMax®-Multi Microplate Reader
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Correlation ABT-199 IC50 and BCL2 expression
17 CellTiter-Glo® Luminescent Cell Viability
GloMax®-Multi Microplate Reader
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ABT-199 induces apoptosis
18 Caspase-Glo® 3/7 Apoptosis Assay GloMax®-Multi Microplate Reader
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In vivo xenograft model human T-ALL
19
Luciferase positive LOUCY cells
Engraftment of cells (6 weeks)
Oral gavage 100 mg ABT-199/kg
or vehicle Measure luminescence on
different time points
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In vivo xenograft model human T-ALL
20
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Genetic subtypes of human T-ALL
21
ETP-ALL Other genetic subtypes human T-ALL
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In vitro ABT-199 sensitivity primary T-ALL samples
22
Hypothesis The cell of origin and cooperative genetic defects define
ABT-199 sensitivity in T-ALL
CellTiter-Glo® Luminescent Cell Viability GloMax®-Multi Microplate Reader
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In vitro ABT-199 sensitivity human T-ALL
23
JAK/STAT signaling
IL7R JAK1 JAK3
ETP Non-ETP
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JAK3 mutant murine T-ALL
24
Harvest HSC from BM
JAK3 mutant
Tail vein injec9on
Monitor leukemia development
Control thymus JAK3 mutant T-ALL tumors
BCL-2
actin
Prof. Jan Cools, KU Leuven
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Conclusions
25
ABT-199 is a promising new drug for human cancer
Our pre-clinical data suggest ABT-199 as a promising new drug
for specific subtypes of pediatric T-ALL
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Pieter Van Vlierberghe
Bioluminescent Cell-based Assay Seminar Day Monday 31 march 2014 UCL De Duve institute
Brussels, Belgium
An unbiased high-‐throughput microRNA library screen iden1fies novel microRNA regulators of key
oncogenes and tumor suppressor genes
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microRNAs
miRISC
3’
5’
5’
3’
mRNA
microRNA
3’ untranslated region (3’UTR)
§ small, non-coding RNA molecules
§ post-transcriptional regulation of gene expression
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microRNAs
miRISC
3’
5’
5’
3’
mRNA
microRNA
§ small, non-coding RNA molecules
§ post-transcriptional regulation of gene expression
mRNA degradation translational inhibition
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§ small, non-coding RNA molecules
§ post-transcriptional regulation of gene expression
§ microRNA function? microRNA targets!
§ microRNA target prediction algorithms!
microRNAs
miRISC
3’
5’
5’
3’
mRNA
microRNA
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3’UTR microRNA library screen
reporter construct miRNA mimic
reporter gene 3’UTR
promotor
5’ 3’ 5’ 3’
HEK-‐293T cells
reporter gene ac1vity
12 cancer genes 470 microRNAs
benchmark data set microRNA interactomes
> 15.000 co-‐transfec1ons
5640 interac1ons tested
interac1on iden1fica1on
3’UTR reporter assay 3’UTR microRNA library screen
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3’UTR microRNA library screen
reporter construct miRNA mimic
reporter gene 3’UTR
promotor
5’ 3’ 5’ 3’
HEK-‐293T cells
Δ(rn −medianrn
MAD) rn = log
rexprnorm
reporter gene ac1vity
microRNA interac1on score
with
12 cancer genes 470 microRNAs
benchmark data set microRNA interactomes
> 15.000 co-‐transfec1ons
5640 interac1ons tested
interac1on iden1fica1on
3’UTR reporter assay 3’UTR microRNA library screen
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3’UTR library screen
EZH2
MYB MYC
NOTCH1 PHF6 FBXW7
RB1
470 miRNAs (miRbase 9.2)
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Cancer gene microRNA interactomes
miRNA-‐FBXW7 interactome miRNA-‐NOTCH1 interactome
44 interac1ons iden1fied 21 interac1ons iden1ed
4 confirmed (already described in literature) 4 confirmed (already described in literature) 40 novel interac1ons (not yet described) 16 novel interac1ons (not yet described)
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Cancer gene microRNA interactomes
0%
20%
40%
60%
80%
100%
120%
140%
scrambled miRNA
miR-223 scrambled miRNA
miR-223
0%
20%
40%
60%
80%
100%
120%
scrambled miRNA
miR-204 scrambled miRNA
miR-204
wild-‐type mutated binding site(s)
miR-‐204
miR-‐223
interactom
e interactom
e
repo
rter gen
e ac1v
ity
repo
rter gen
e ac1v
ity
rescue experiments!
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Acknowledgements
35
Center for Medical Gene9cs (Ghent) Sofie Peirs Frank Speleman Filip Ma_hijssens Béatrice Lintermans Evelien Van den Eeckhoudt
Lab Jules Meijerink (Ro_erdam) Jules Meijerink Kirsten Canté-‐Barre_
Lab Jean Soulier (Paris) Jean Soulier
VIB Inflamma9on Research Center (Ghent) Steven Goossens
Department of Clinical chemistry, microbiology and immunology (Ghent) Tom Taghon Inge Van de Walle
Department of Pediatric Hemato-‐Oncology (Ghent) Tim Lammens Barbara De Moerloose Yves Benoit